is that the chopper with blades at the bottom and top?
describe your difficulties lah ....

there is no way a coaxial heli that size can handle anything more than aircond breeze in currently available technology

coaxials dont handle wind very well at all but bigger does do a little better than smaller ones

if u just wanna zoom around the house for fun .. then those rm50-100 stuff will do u fine but not much control la
next step up with be those esky lama coaxials .. rm200-300 .. they will handle outdoors if no wind
then u are looking are a much bigger step
its either u spend rm600 for a ESKY BELT CP (google that) or u spend rm2.5k for a complete setup

it all depends on your budget and requirement/target

google up ESKY LAMA & ESKY BELT CP and have a look at what they can do and handle .. that should give u a good idea
beyond that it will not be cheap anymore

Maybe you want to read heli v2 and heli v3 threads, lots of information by Mr QiW.